Electric warp stop motion



April 5, 1932. O v, NE I 1.852217 ELECTRIC WARP STOP MOTION Filed March 27, 1929 2 SheetsSheet l ea 5; 30 5E 30 as a? 1.5 20

W 11 H :9 $4 (I 71 2 H i 14 12 41 i i Z [area/or ascor yf /m W -:1 *W

April 5, 1932. v PAYNE 1,852,217

ELECTRIC WARP STOP MOTION Filed March 27, 1929 2 Sheets-Sheet 2 latentecl Apr. 5, 1932 earns or i cE OSGAB v. remi on woncns'rnn, MASSACHUSETTS, ASSIG'NOR ro onomr'ron & KNowLEs LOOM WORKS, or woacns'rnn, massacnnsnr'rs, aoonronarlon or .MASSACHUSETTS ELECTRIC VTABP STOP MOTION Application filed March 27, 1929. Serial Elm-350,401.

This invention relates to improvements in 7 electrical warp stop motions for looms, warpers and similar machines, and 1t 18 an important ob ect of the 1nvent1on to provide a motion of this type which issubstantial in coning a lower base portion connected to one side of the circuit and provided in its upper edge with a groove to receive a narrow strip wh1ch projects upwardly from'the base member and is held out of contact with the base member by insulating material. Experience shows that the upwardly projecting contact strip is likely to become broken in handling because of the fact that. it projects above the base and is not shielded or protected in any way. It is an important object offmy present invention to provide a two-part contact bar, the portions of which are separated by insulated "material, one of the parts being folded around the other so that said other part is protected and has no free end-to extend beyond the eongnes or enclosing outline of the folding memer. a

It isa further object of my present inven tion to provide a drop wireto be used inconneetion with my improved contact bar having provision for electrically connecting both members of the bar when the drop wire is in fallen position. The drop wire and bar have cooperating parts so that as the drop wire falls it is moved transversely of the bar to bring a part thereof normally out of'contact with any portion of the bar into contacting relation with the insulated member of the bar. This result may beaccomplished by having apair of inwardly extending projections formed on the face of the slot near theupper portion thereof, these pro ections contacting one with the bar which enfolds the insulated to cause the previously mentioned lateral movement of the drop wire to move thelatter into engagement with the insulated member of the bar. l

.Ditlerenttypes of looms require different numbers of banks of drop wires, depending upon the loom ,and the grade of cloth being woven. On .a gingham'loom, for instance, two banks or ,two contact bars will suflice whereas in somesilk looms-six bars areneeded to take care of the greater numberof warp threads for the same width of fabric. It has previously been customary to provide a different setof parts foreach different size of warp stop motionythe motion employ-ing only two banks having relatively small castings or parts to support the bars, and-the motions having six banks using diiferent and {larger parts. It is a further and important object of my present invention to provide support ing structurefor the contact bars, said structure'beingbuilt up of a series of units ofsimilar construction. In-this way when it is de- .sired, to enlarge a two-bank motion to carry four or six-or any other number ofbarsgreater than two it is necessary merely to, add another unit, retaining the previously used units. 7

As shown hereintwo adjacent units cooperate to hold one contact bar in position, the purpose of this construction beingtto per- .mit a clamping of the router member-of the rangement of parts hereinafter described and setforth in the claims.

In'the accompanying drawings, wherein a convenient embodiment ofmy inventionis set forth, a p

Fig. 1 is a top plan view of my improved imotion,parts being broken away for the sake -55 of Fig. 6, and

Fig. 6 is an end elevation of one of the contact bars.

Referring particularly to Figs. 1 and 2, I

have shown a loom frame 10 having a whip roll or warp guide 11 over which the Warp W may pass. The warp beam is assumed to be at the right of Fig. 2 while the weaving inessentially two important parts one of which strumentalities are to the left thereof Each loomside has secured thereto abracket 12 having a hub' 13 in which is slidably mounted ths vertical shank 14 of a holder 15. Screws 16, one for each of the hubs 13, hold the shanks 14 in adjusted vertical position. Angle bars 17 are provided, one for each side of the loom, and have relatively short arms 18 received by the hubs 15. Set screws 20 act to hold the arms 18 in adjusted longitudinal position with respect to the corresponding hubs 15. The bars 17- have relatively long horizontal extensions 21 which lie substantially parallel to the loomsides and also to the direction in which the warp is fed through the loom. The matter thus far described is of common construction, being substantially the same as that on a well-known type of mechanical warp stop motion. I My, invention as set forth herein comprises is the contact bar that cooperates with the drop wire to establish an electric circuit and the other of which is a means for holding said bars in fixed position. I will describefirst the bar and the drop wire with which it cooperates and then the support.

It is to be understood that drop wires are supported by the warp threads and are arranged in oneor more rows extending transversely ofthe warp threads at a point preferably between the harnesses and whip roll ofthe loom. I wish it to be understood that although I am describing the present motion in connection with a loom, yet the motion is not limited to this type of machine as it can be applied to other machines such as warp'ers where the problem exists of stopping the machine upon warp failure. In electrical motions there are also employed electromagnets or batteries or other sources of current which contact upon the'falling of. a drop wire, it.

'being understood that any of the approved forms of mechanism known for stopping the loom through electrical apparatus may be employed.

The contact bar, as shown more particularly in Figs. 3 and 6, comprises an outer enfolding member having a substantially vertical surface 31, the intermediate portion of which may be provided with a crimp 32. Said crimp is formed so as to have an inclined upwardly facing surface 33 for a purpose to be described hereinafter. The top and bottom portions of the enfolding member are bent back toward the crimp substantially as shown in Fig. 6 and are each formed with a retaining wall 34 which extends toward the center of the bar but is spaced from the vertical wall 31.

A sheet of insulating material 35, such as fiber, is interposed between the member 30 and the secondcontact member 36. The latter member has upper and lower, edges 37 and 38, respectively, which extend into the elongated pockets defined by the wall 31 and the walls 34. The second contact member is kept electrically out of contact with the first named member by means of the insulatingstrip and is provided with a vertical surface 39 lying wholly within the enclosing outline of the outer enfolding contact member. 7 V

The relation of the enfolding member and the surface 39 is such that a straight line connecting the right hand surfaces of the walls 34, as shown in Fig. 6, will pass to the right of the surface 39, or in other Words,

the second contact member will lie between this imaginary line and the wall 31 and inclined surface 33. This is an important re lation between the two parts and 'is rendered desirable by reason of the fact that the drop wires should not be able normally 1 to have contact with the outer enfolding member and also the surface 39. As shown in Fig. 6 the crimp 32 is substantially intermediate the top and bottom of the surface 39, althoughI do not wish to be limited to with a preferably closed slot 42. As shown 3 in Fig. 3 those portions of the drop "wire which lie on the right and left sides, respectively, of the slot 42 adjacent the upper end of the latter are formed with inclined surfaces 43 which define contact points44aand 446, respectively. a

The distance between said points is at least equal to and preferably slightly in excess of the thickness of the upper part of the. bar.

The slot 42 has an upward extension 45 J wider than the distance between the points and projecting somewhat above them to receive the contact bar when the drop wire is fallen. It is to be noted that the drop wires are reversible about a vertical axis so that no particular care need be exercised in passing the contact bars through the slots 42.

Under normal conditions the drop wires will be in the raised position indicated by the drop wire at the left of Fig. 3 with the points and also preferably though not necessarily the cam surfaces 43 located above and out of engagement with the contact bar,

Then a warp thread breaks the corresponding drop wire will descend, the effect of which is to cause one of the inclined surfaces 43 to move the drop wire transversely cf the bar that is, to the right a short distance as viewed in Fig. 3. This movementof the drop wire will bring the contact polnt 445 over the crimp 32 so that upon a further descent of the drop wire said point will engage the surface'33 and move the drop wire in a-reverse direction to cause the point 44a at theright as viewed in Fig. 3 tocome in contact with the plate or member 36. When this latter condition takes place the two members of the bar will be electrically connected through the drop wire, the inclined surface 33 being in contact with one of the points and the member 36 being in contact with the other point. When this condition exists mechanism not shown willbe set into motion to arrest movement of'the loom.

As shown in Fig. 1 I have indicated a wire 46whicl1 is in contact'withfa grounded part of the structure 'to be described and have shown a second wire 47 connected electrically to thesecond contact member 36 by means of "screws 48 as shown in detail in Figs. and 6.

The latter wire is connected to all of the insulated contact members 36 and may connect with a wire 49 which is connectedto loom stopping mechanism. As previously stated it is not considered necessary to set forth herein the particular electrically operated mechanism for stopping the loom when the two operating bars are electrically connected.

The contact members and 36 may be made of any approved material and may be formed either by a rolling process in which case the bar will be continuous to be cut off inappropriate lengths after assembly, or "said by means er a wire yet do not wish to be [limited to any particular means for connect 'ing' said insulatedmembers together electriadjacent parts of two units and the'manner in which they cooperate to hold in position the contact ba'rb'etween them will .suffice as description'forallof said unitsf The right hand member'of a pair is provided near the upper left corner thereof with a short verti-,

cal surface 51 to bear against the right upper side of the corresponding contact bar, in this instance the upper wall 34, That part of the leftmember opposite the surface 51 is provided with a notch 52'into which extend the upper part of the contact bar. The horizon tal dimension of the notch is slightly less than the thickness of the'adjacent part'of the .contact bar, there being a space 60 betweenthe upper ends of the members to permit clamping of said contact bar in the notch by surface 51.

The left member has a. depression 53 into which projects the crimped part 32 of the contact bar. A second notch 54 in the left member located preferably under notch 52 receives the lower end of the contact bar, and the latter is held tightly in the notch 54 by a short vertical surface 55' on the right member under and serving the same function as surface 51. It will be understood that when two adjacent members 50 are pressed toward each other the contact bar between them will not only be held in place but will vided with a bore 57 through which extends the supporting element 21, and asther'e'is one of the latter at each side of the looinit'will be apparent that the bars and members will beheld rigidly in placewhen said members 'side "of which is similar to the left sides of" the .units 50, but the right side of which is formed to receive the thrust of a nut 58 v threaded on rod 21. The left band member 50 as shown in Fig. 2 is engaged by a second clamping element 63 the right side of which is formed substantially as the right sides of Q the members or units 50, except that the 59 also threaded on red 21. By means of these two nutsthe several parts of the support which are mounted on the extension or I may be separated by a slight space 61 similar 2O. invention relates to the fact that thedrop rods 21 maybe clamped tightly together so as to insure tight contact between the units and the contact bars. Those portions of the units which are adjacent the extension 21 in purpose to the space 60.

In certain forms of warp stop motions it is desirable to have so-called separator bars which will assist in positioning the drop wires and I have indicated these generally at 70 in Figs. 1, 2. and 3. These bars may be received by slots 71 formed in the left hand side of each unit and also in clamping element 62 as viewed in Fig. 2. Each bar is are omitted very little distortion of the motion as a whole will result when the nuts 58 and 59 are tightened.

When it is desired to enlarge the warp stop 'motion to accommodate a greater number of drop wiressuch, for instance, as when a greater number of silk threads are to be placed in the warp, it is necessary merely to remove the nuts 59 and clamps 63 and place on the supporting extensions 21 as many additional units 50 as are required for the additional contact bars, after which the clamps and nuts may be replaced and tightened to insure proper engagement between the contact bars and the units. a

From the foregoing it will be seen that I have provided avery simple form of contact bar which is of durable and strong construction, the crimp 32 and also the round upper and lower edges of the outer enfolding membertending to stiffen the bar to prevent the I same from being bent out of normal posi- -tion.. It will also .be seen that the contact 7 bar isso formed that the insulated member lies'entirely within the enclosing outline of the outer enfolcling member so that accidental contact with a drop wire is impossible. It will also be seen that I have provided a a particular form of drop wire which is reversible, being. symmetrical about a vertical axis, the drop Wire having portions to cooperate with the elements of the contact bar so that the two members of the latter will be electrically connected when the drop wire falls, although the drop wire is inefiective to connect the memberselectrically when the drop wire is in normal raised position. Furthermore, it will be seen that any desired number of units 50 may be employed, depending upon the number of contact bars'to be used, so that it is a very simple matter to enlarge a two-bank. motion so. that it will accommodatesix or more banks of drop wires. Again, it will be seen that the units are so formed as to effectively clamp the contact bars in position not only to prevent. longitudinal movement of the same but also to insure proper electrical connection.

.Afurther and important feature of my wire, in order to connect the elements of the contact bar, must have a motion with a horizontal component, that is, the mere vertical motion of a drop wire or-other metallic substance will n ot suffice to close the circuit which causes a change in the operation of the loom or other machine. Also, the contact surface is vertical, so as not to collect lint or The devices for supporting the warp stop motion and particularly the built-up unit construction is not-claimed herein but forms the subject-matter of a divisionalapplication I Serial No. 462,651, filed by me June 20, 1930.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without'departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but What I claim is:

1. In an electric warp stop motion, a drop wire of electric conducting material having a slot therein, a contact bar extending through the slot, said contact bar having an outer enfolding member to have engagement with the drop wire under normal conditions, and said bar having a second member lying wholly within the outline of the first named member and normally out of contacting position relatively to the drop wire.

2. In an electric warp stop motion, a drop Wire havinga slot therein, a contact bar extending through the slot and having two members, one member extending above and on both sides of the other member so that said other member is normally out of contacting position with respect to the drop wire, and means to cause the drop wire to move laterally into contacting relation with thial said other member when the drop wire 3. In an electric warp stop motion, a drop wire having a slot therein, a contact bar formed of two members electrically insulated from each other, .1 of said members lying Wholly within" the outline of the other ber and beingfnormally out of contacting position relatively to the drop wire and means to cause the drop wire to move laterally into electriccontact with the'first named member s when the drop wire falls.

i." In an electric warp'stop motion, a drop wire having a slot therein, a projection ex tending into the Slot, a contact bar having two insulated members one of which is normally' in po'sitiOn'to be engaged by the drop wire and the other member of which lies under'the first named member andnormally out of contact with the drop wire, and means operative when the drop wire falls'tomove the projection into electrical contact with the said'other'memberf, j 5 '2 an electric warp stop motion, a drop wire having a slot therein into which pro: i s Qet in's po t of he'dr p W e, a contact bar extending through the slot and having two members insulated from each other'fone ofis'aid'members lying abovethe other and normally acting with the drop wire,

said othermember beingnormally below the nt c por io f he .drop e an means acting when the drop wire falls to move the'cont acting portion'thereof laterally into engaging contact with the said other member.

I an ee r er rp st p mo on a rop wire haying slottherein, a projection extending'into theslot, contact bar formed of two insulated contact members, one'of said members lying above and on'each side 0 the other member'anld normally contacting th e'dro'p wire,'the other memberberng normally out of contact with the pro ect1on, and

means "acting as the drop wire falls to mpve' the projection under the first named member and into el ectrical'contact withthe said other contact member.

7; In an el'e ctrical warp stop motion, a drop wire, a pair of insulated contact members mumany stiffening each other to be electrically connected by the drop wire upon warp fault,

engagement of the drop wire with both members being dependent upon lateral movement ofthe dro wire" to move a portion thereof 3 into electrical contact with one of the members. i

In an electrical warp stop motion, a drop wire, a pair of insulated contact members, one overhanging the other, said members to be electricallyconnected'by the drop wire, the

( im the amp Wi e de en in p n a bined downward and lateral motion engagement with both members.

10. In an electrical warp stop motion, a 1

drop wire having ajslot therein, a contactbar extending. through the slot and havingtwo members insulated from each other, one of said members normally held out of contacting ing a substantially Vertical contacting surface, and means efiective when the drop wire falls to move a portion thereofinto electricalengagement with the vertical surface.

llJA contact bar for an electrical warp stop mot on, said bar compris ng an mne'r member and an'outer member insulated from the inner member, the outer member extend mg around three s des of the inner member and being pressed against the fourth side of position relativelyto the drop wireand hav said inner member so that the latter lies Iwholly within the outline the outer memer.

stop motion, said bar comprising twocontact members insulated from eachother, one'mem ber being folded over'the top and'under the bottomof the other member,-saidother meme berlying below the folded overhanging part ofthe said first member irrespective of which side of'thefirst member'is uppermost.

' 14;. contact bar for an electrical warp stop motion, said ba'r comprising two'contact members insulated from each other, one memher being confined within the outlines; of the other and having an exposed surface.

A contact bar for an electrical warp stop motion, said bar comprising two contact members insulated from each other, one member being heldbetween confining portions of the other and having an exposed surface which lies between spaced confining portions of the other member, said confining portions being symmetrically disposed with respect to al 'central horizontal axis passing through both members' 16. A contact bar for an electrical warp stop motion, said bar comprising two con tact members insulated from each other, one member extending over the other member so that said other member lies-between. vertical planes touching opposite horizontal ezctremt ties of the said one member. s

17. A drop wire foran electrical Warp stop motion operating with a contact bar having an inclined surface'on one side and'a contact surfaQQ 0n the opposite sidelyingwithih the line f t e bar, sa Manama/ea contact bar for an electrical warp stop m'otion,'said bar comprising two contact slot for the contactbar, and a pair of similar projections formed on the'drop wire and extending into the slot, said slot being symmetrical about a vertical central axis pass.

ing through the slot, and the projections-be ing opposite each other and on opposite sides of the axis when the drop wire is in vertical position.

18. In an: electrical warp stop motion, a

drop wire, a pair of contactmembers to be electrically connected by the drop wlre, one of said members having a part overhanging the other member, and means acting on. the

"drop wire as the latter falls to move the same into electrical connection with said other member.

19,. In an electrical warp stop motion, a

drop wire, having a hole therein, a. pair of contact members to be electrically connected by and extending through the hole in the drop wire, one-of said members having a part over hanging the other member, and means actlngv on the drop wire as the latter falls to move the same into electrical connection with said L other member.

.20. In an electrical warp stop motion, a drop wire, a pair of contact members to be electrically connected by the drop wire, one "10f said members having a part overhanglng the other member,,and means operatlve when the drop wire falls to cause said wire to be electrically connected to both members,

21. In an electrical warp stop motlon, a

drop wire, a pair of contact members to be electrically connected by the drop wire, means overhanging one of the 'members to keep the drop wire normally spaced from said member, and means to effect contact between "i the drop wire and both members when the drop wire falls. V

22. In an electrical warp stop motion, a drop wire having a slot into which extends a projection and also an inclined edge, a con- "i tact bar extending through the slot and formed of two insulated members, one of said members lying above the other member and the the latter being normally out of engagement with the projection, the inclined edge l acting when the drop wire falls to engage the first named member to move the projection laterally into contact with the said other member, the drop wire thereby electrically connecting the members of the bar.

. the drop wire, a contact member insulated from the upper portion of the bar, and a projection on the drop wire normally out of engagement with the contact member but capable of engagement therewith, contact of the member and projection being dependent upon lateral movement of the projection into electrical contact with the member an d under the said upper portion of the'contact bar.

24. In an electrical warp .stop motion, a

dropwire having a slot therein into which extend two substantially similar integral pro-' j ections, a contact'bar extending through the;

slot and having two members insulated from each other, one of said members be ng po's1- tioned to have contact with the drop wire normally and the other member positioned to be normally out of contact with the drop wire,

and means effective upon fallingof the drop wire to engage one projection and move the drop wire laterally to cause the other projection to have electrical contact with the'se'c- 0nd named member. i I

25. In an electrical warp stop motion, a

drop wire having a slot therein into which eX- tends two substantially similar projections,

said slot and projections being symmetrical about a vertical axis, a contact member extending through the slot andnormally below the projections, a second contact member insulated from the first named member,"

26. In an electrical warp stop motion,"a drop wire having a slot therein intocwhich extend .two substantially similar projections,

a contact bar extending through the slot and having two members insulated from each other, one of said members being positioned to have contact with the drop wire normally and the other member positioned to be normally out of contact with'the drop wire, and means effective upon falling of the drop wire to engage one projection and move the drop wire laterally to cause the other projection to have electrical contact with the second named member, said drop wire being reversible so that either projection will cooperate with either member. x

- 27. In an electrical warp stop motion, a drop wire having a slot therein into which extend two projections, one horizontally opposite the other, a contact bar extending through the slot and formed of two contact members which are insulated from each other, I

one of said members having a rib normally below the projections, and the other member having a contacting surface normally below the projections and normally out of engaging position relatively to the drop wire, the dropwire when falling due to a warp fault effectin gengagement between the rib and one projection'to move the drop wire laterallyto bring the other projection into engagement with the second named member to connect the contact members electrically. I

28. In an electrical warp stop motion, a drop Wire having a. slot therein, and a con tact bar in the slot and having two insulated members one of which lies above and also under the other member to prevent the ends of the slot from contacting with said other member.

29. A contact bar for an electrical warp stop motion, said bar comprising two contact members insulated from each other, both members having parallel vertical portions,

-the top of one member being folded over the top of the other member and extending partly down along the other side thereof, and the bottom of said one member being folded around the bottom of the other member and extending partly up along the opposite side of the latter, the folded parts being spaced to expose a portion of the other member and the latter lying between the outer limits of the folded part and the vertical portion of the said one member.

30. A contact bar for an electrical warp stop motion, said bar comprising two contact members insulated from each other, one member having a vertical wall formed with 5 an upwardly facing inclined surface, said member enclosing more than half of the other member and having a part overhanging the other member, said other member having an exposed surface which is on the side of the contact bar opposite the side with the inclined surface.

31. A contact bar for an electrical warp stop motion, said bar comprising two contact members insulated from each other, one

member formed with a vertical wall from which extends a rib having an upwardly and also a downwardly facing inclined surface, said one member having spaced similar parts which extend horizontally on both sides of the other member, said similar parts and the inclined surfaces being symmetrical about a horizontal axis passing between the inclined surfaces, so that said contact bar may be used with either edge up, a part of the said one member overhanging the other member whichever of said parts is uppermost.

32. A contact bar for an electrical warp stop motion, said bar comprising two insulated members one of which lies both over and under the other member.

33. A contact bar for an electrical warp stop motion, said bar comprising two contact members insulated from each other, one member held by the other member from bmovement in all directions transverse to the 34L. A contact bar for an electrical warp stop motion, said bar having two insulated members one of which is exposed through a horizontal opening in the other.

35. In a warp stop motion, a bar extending transversely of the warp threads, a bank of drop wirw each having a slot therein through which the bar extends, a rib extend- 5 ing along the bar below the upper surface of the latter, a projection on the drop wire extending into the slot and adapted for engagement with the rib when the drop wire is fallen, the rib and projection of a fallen drop wire establishing a pivot around which the upper part of the drop wire swings when defiected laterally to cause the upper part of the slot in the fallen drop wire to engage the upper surface of the bar to resist further movement along the bar.

In testimony whereof I have hereunto affixed my signature.

OSCAR V. PAYNE. 

